package org.jeecg.modules.demo.ipds.service.impl;

import org.jeecg.modules.demo.ipds.service.IXMLCompare;
import org.springframework.stereotype.Service;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

@Service
public class XMLCompare implements IXMLCompare
{
	private DocumentBuilderFactory factory;
	private DocumentBuilder builder;
	
	public XMLCompare()
	{
		factory = DocumentBuilderFactory.newInstance();
		try {
			builder = factory.newDocumentBuilder();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
	}
	
	@Override
	public void compare(Document sourceDoc, Document targetDoc ) {

			Map<Integer,String> result = executeCompare(sourceDoc,targetDoc);
			if(result.isEmpty())
			{
				System.out.println("两个XML文件内容相同！");
			}
			else
			{
				System.out.println("两个XML文件的内容不同！");
				for(Integer element: result.keySet())
				{
					System.out.println("number"+element+":"+result.get(element));
				}
			}
	}

	private Map<Integer,String> executeCompare(Document sourceDoc, Document targetDoc) {
		//该标签用于限定范围
		String topTag = "Protocol";
		Map<Integer,String> resultMap = new HashMap<Integer,String>();
		NodeList sourceList = sourceDoc.getElementsByTagName(topTag);
		NodeList targetList = targetDoc.getElementsByTagName(topTag);
		String sourceEleValue;
		String targetEleValue;
		if(sourceList.getLength()!=targetList.getLength())
		{
			System.out.println("这两个XML对比的内容长度不同！");
		}
		else
		{
			for(int i=0;i<sourceList.getLength();i++)
			{
				sourceEleValue =  getElementValue(sourceDoc,"ByteItem",i);
				targetEleValue =  getElementValue(targetDoc,"ByteItem",i);
				if(!sourceEleValue.equals(targetEleValue))
				{
					resultMap.put(new Integer(i),"源文件当前值为:"
							+sourceEleValue
							+"--目标文件当前值为："
							+targetEleValue);
				}
			}
		}
		return resultMap;
	}	
	
	
	private String getElementValue(Document doc,String tagName,int index)
	{
		return doc.getElementsByTagName(tagName).item(index).getFirstChild().getNodeValue().trim();
	}
}